How to Say "gravely" in Spanish
The Spanish word for “gravely” is “seriamente” — A2 level. This is a very common word in everyday Spanish.

Examples
Ella me miró seriamente y me preguntó si estaba bien.
She looked at me seriously and asked me if I was okay.
Tienes que tomarte el trabajo seriamente si quieres un ascenso.
You have to take the job seriously if you want a raise.
Hablamos seriamente sobre el futuro de la empresa.
We spoke seriously about the future of the company.
Adverbs ending in -mente
Most Spanish adverbs that describe how something is done are formed by adding '-mente' (like English '-ly') to the feminine form of an adjective (e.g., 'seria' + 'mente' = 'seriamente').
Using the Adjective instead of the Adverb
Mistake: “Hablamos serio.”
Correction: Hablamos seriamente. (You need the '-mente' ending to describe the verb 'hablar'.)
Related Translations
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